/**
 * 设置原始rem
 * 16 / 原型宽度 = rem / 实际宽度
 * @param {实际宽度} realwith 
 * @param {原型宽度} settingWidth 
 */
export const setRemByWidth = (realwith, settingWidth) => {
  var docEl = document.documentElement
  docEl.style.fontSize = 16 / settingWidth * realwith + 'px';
}
